Hong Kong Professional Teachers' Union

The Hong Kong Professional Teachers' Union (HKPTU) is a pro-democracy labor union, professional association, and social concern group in Hong Kong, founded in 1973. The union was politically liberal, socially activist, and concerned with the legal rights of teachers, and it came to support democratic protests such as the 1989 Tiananmen Square protests. During the 2010s, the union had 90,000 members.